Abstract: The present invention relates generally to the system and method for extending lifetime of automatic transmission, and more specifically to the system and method for extending lifetime of GM 700r4 through 4I70e automatic transmissions input shaft rear stator bearing by increasing the bearing surface area on rear stator bearing. By increasing the durability of the rear stator bearing, the most common failures in the transmission, which are the failure of the input output shaft lubrication seal, rear planetary failure, and the binding and burning of the clutch pack, can be overcome. The present invention increases the rear stator bearing life, the input output shaft oil seal life, the rear planetary life, and the clutch pack life.

Abstract: The objective of the invention is to provide a fast way to adjust endplay on output shaft without removing entire output shaft gear train assembly. One embodiment of the present invention is to place the shims in new location between the outer most ring gear hub and the ring gear stop on the output shaft. The new shims will have spines so they can be placed between the output stop and the ring rear hub. Another embodiment of the present invention, a preferred method to adjust endplay is to use a @ Torrington thrust bearing between the transmission case and output shaft. This will prevent reoccurring endplay adjustments from wear.

Abstract: The present invention relates to automatic transmissions. In particular, the invention relates to a novel method and device applied to the GM 700r4/4l60e transmission which is known to have rear planetary gears lubrication failure at 60,000 miles. The planetary gear pins suffer inadequate lube due to lube oil supplied from output shaft is centrifugally thrown off the rotating planetary. The pins set at right angles to the flow of oil making lubrication of the pins inadequate. The method of the present invention improves the lubrication by installing an auxiliary oil line which connects the OEM oil line at the back of transmission case, runs through the case and stops at the top of spring retainer, providing horizontal oil spray. Pins are available with oiling holes, if used with horizontally pressurized oil sprayed thru holes placed in the planetary hub then into the pins failure would not occur.

Abstract: The present invention relates to automatic transmissions. In particular, the present invention relates to the GM 700r4 automatic transmission. More particularly, the invention relates to a novel bearing/oil seal designed to replace the OEM input to output oil seal in the GM 700r4 transmission which is known to have oil seal failure history. The OEM input and output shafts of transmissions produce substantial movement relative to each other. Excessive movement between the shafts causes rapid oil seal wear, oil loss, and transmission failures. The new bearing/oil seal design of the present invention serves to couple the shafts together, and provide a vertical sealing face for a more durable seal. The benefits from the new bearing/oil seal are less movement throughout the drive train, longer oil seal life, less binding of the ¾ clutch pack, longer transmission shelf life, and increasing overall durability.